Put everything (except the puffed wheat and vanilla) in a saucepan, and boil until it goes hard if you drip some into a cup of cold water.

While that is happening, grease up a roasting dish and put it aside. Pour the puffed wheat into a bowl big enough to handle it all.

When the cocoa candy mix is ready, remove from heat and stir in the vanilla (it'll bubble lots and fill your kitchen with the smell of vanilla).

Then pour it all over the puffed wheat and mix it all around till everything is horribly sticky. Dump it all into the roasting pan and press it all in.

Leave to cool for a while as you go and pick bits of sticky puffed wheat out of your socks and off the cat.

Carve the now-hardened mass (the puffed wheat, not your socks or the cat) into cubes and put it all in an airtight container, and eat some periodically. Then go back to picking bits of sticky puffed wheat out of your socks.

Enjoy.

For further puerile amusement after a couple of hours, dutch-oven your significant other.